TVB artists Linda Chung and Sunny Chan are currently shooting for new series Jiujiang's 12th Square and was cross contaminated, both caught the flu. This led to many of the cast and crew of the series to have fallen ill as well.

Linda was called 'Chung Source' by the series crew. She said: "They are just joking! I am not unhappy, I went to see the doctor three times and took a day off. Last week I got better, but my voice still has not recovered."

Sunny said: "I have experienced a lost voice in my life. I lost my voice 4 days and finally got better on the 11th day of CNY. My wife had a fever on the 4th day of CNY (the 7th). The doctor confirmed that it was the swine flu. (Wear mask after recovery for prevention?) Nope! I rely on my deep breathing exercises to maintain a strong body."